attempting to calibrate the machine to measure more accurately will cost big bucks.
No it will not.. There are solid state sensors that measure liquids in microliter amounts. They have sensors already on the cartridges and in the machine to measure usage. All it would take is a firmware that measured the ink and issue appropriate warnings while in use. Throwing away 8 OZ of ink that costs about 40 bux is ludicrous.
For example. My printer used to kill cartridges when it though it was time.. I installed a hack and now those same cartridges are printing 5x times longer than allowed before,, and are still operating just fine.
I would be curious to see how much ink is in he bags before using it, maybe they really have 900ml even though it's labeled 700ml and they have actually accounted for the issue.